What are two ways variation in the trait could be introduced into the population?

1 answer:

3 0

A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. I hope this help you

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What would happen if we didn't have photosynthesis and cellular respiration?

gayaneshka [121]

1)Without photosynthesis: If we didn't have plants, algae and bacteria to do the photosynthesis, CO2, a air pollutant wouldn't be converted in to glucose for those organisms and there would be no more Oxygen released to the atmosphere. Less photosynthesis means less oxygen production and many organisms, like us, would die.
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Ultimately, will cause the death of the aerobic organism.

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Which of the following describes a function of epithelial cells?

DerKrebs [107]

Sensing, secretion, protection, transcellular transport, and selective absorbtion

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A key difference between primary cell cultures and secondary cell lines is that:____.a. primary cell cultures tend to stay alive

ivann1987 [24]

Answer:

d. the cells in primary cell cultures do not divide.

A key difference between primary cell cultures and secondary cell lines is that the cells in primary cell cultures do not divide.

hope it helped you 

Explanation:

The main difference between primary and secondary cell culture is that the primary cell culture contains the cells directly obtained from host tissue, whereas the secondary cell culture contains sub-cultured cells from primary cell culture.

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